A sport bike, usually japanese, but somtimes italian, rarley german (the new BWM K1200R) or american (buell) The minimum that really is a crotch rocket is along the lines of the classic 2 strokers like the RZ350 or the NS400r, cominng up to the the pinnicle in the likes of the RCv211 or the yamaha M1. More common examples are along the likes of the ninja/GSXr/YZFr/CBR series.

Very fast, even the slowest of these (the RZ350 and NS400R) can run times in 11's in bone stock. with somthing like a turboed GSX1300R hitting 7's.

Did ya see the turbo busa video where the crotch rocket rips a big ol viper a new asshole?

A specific type of motorcycle, typically distinguished by it's aerodynamic 'hunched-over' seating position and high power to weight ratio. Often favoured by stunters, who choose the bikes because they are light and easy to perform tricks (such as wheelies and stoppies) on.

Crotch rockets are not always Japanese motorcycles, Italian companies such as Ducati manufacture quite high-quality crotch rockets as well.

Also known as 'sportbikes'.

The Ducati 999, Suzuki GSXR1000 and Yamaha YZF-R1 are good examples of ~1000cc crotch-rockets.

Motorcycles are broken down into general categories. Off road, Track, Cruisers ( incl. Harley Davidsons, Kawasaki Vulcan, Yamaha Roadstar), Sport Touring (Honda ST1300), Touring (Honda Goldwing) and Sport.(Honda CBR600, Yamaha FZ6) Sport bikes are very fast highly mobile bikes where the rider is low and leaning forward. The bike is generally a cafe race style. A Crotch Rocket is the slang term for Motorcycles of the Sport category. The term is derived from their incredible speed. The previous definition of "Non-Harley's" is patently false. I have a Honda Goldwing and it is definitely not a Crotch rocket.

a motorcycle, designed in such a fashion as to give the rider the sensation of flying like superman, with the ability to accelerate fast enough to rival a rocket, and contain it all in a package small enough to fit in your crotch.